You see, when I was at school, "casual" was a phrase to describe a stylish, if unchallenging, sort of person - floppy fringe, nice trousers, smart jumper and shirt, shiny shoes; nice boys and girls, basically - so it was part of my vocabulary. However, I had my mum, and her Tetris addiction specifically, in mind whenever I referred to casual gamers.
Casual/Hardcore has become so ubiquitous now that I hesitate to claim it came from me, but I can't think where else it might've started. Indeed, Digitiser used to use casual rather sneeringly, looking down our noses as those for whom gaming wasn't the be-all and end-all, and implying a certain elitism.
We never really meant it, or even particularly cared, but as the years wore on it became clear that there were those who really took it seriously. For them, there was a badge of honour in being a "hardcore" gamer - and everyone else was in some way deficient.
Even though the casuals were the ones with an actual life and families and that...
So, if we created the casual/hardcore terminology - which has since spread around the world - then I'm sorry. But - hey - it's okay: because now there aren't just two types of gamers.
According to gaming and esports analysts Newzoo, there are now as many as EIGHT types of gamer!